Ok, i have a 305Tbi, 89Formula, ive added headman, headers, flowmaster exhast, open element air cleaner, 160degree themostat, synthic oil. What is the next peformance thing i can do? Should i change the rear gears, change the fuel injection, cams, heads, whats next?

 

i would go with the cam next, maybe heads at the same time if you can afford it. as for the injection, there are alot of possibilities, what is it you want from your car, reliability and economy, or speed that will push your eyes out your *** ?. or both, anything is possible?